LMSYS Chatbot Arena: top model is claude-opus-5.5-high (ELO=1509)

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| Rank | Model | Vendor | ELO | CI | Votes |
|---|---|---|---|---|---|
| 1 | claude-opus-5.5-high | Anthropic | 1509 | 12 | 2307 |
| 2 | claude-opus-4-6-high | Anthropic | 1505 | 3 | 76518 |
| 3 | claude-fable-5-high | Anthropic | 1504 | 4 | 36462 |
| 4 | claude-opus-4-7-high | Anthropic | 1502 | 4 | 64007 |
| 5 | claude-fable-5.1-max | Anthropic | 1501 | 7 | 9942 |
| 6 | claude-opus-4-6 | Anthropic | 1498 | 3 | 80836 |
| 7 | muse-spark-1.2 (xHigh) | Meta | 1496 | 10 | 3422 |
| 8 | claude-opus-4-7 | Anthropic | 1495 | 4 | 65051 |
| 9 | muse-spark-1.3-max | Meta | 1494 | 7 | 10036 |
| 10 | gemini-3.8-flash-high | Google | 1492 | 5 | 21728 |

document fetched 2026-09-27 22:34